Does Kreia hate you. The fool no longer talks to you? Your general-ness over?
Then help me help you by telling your shocking release in this newspost, so we may squash this bug once and for all! Hopefully.
Maybe.
I'll try my best...

Pretty much the title.
I tried my best to replicate the bug where Kreia, Atton and/or Bao-Dur stop talking to you, but... I can't make it happen at all.

So if anyone has any savegames, or if you had it happen can tell if you recall what you did on the sparring mat (which teammates?, did you loose a fight by cheating?, left the mat? Was the handmaiden still hostile after you said you'd return later?

I've already made a small modification which hopefully makes it less likely to appear, but without replication, I can't make sure it'll never happen again anymore :/
And judging from the Steam forums, it's happening more frequent than ever before...

I haven't seen that bug, but I have discovered that if you train in the Echani with the Handmaiden's sisters, then the option of training with the Handmaiden herself disappears. So unless you have a saved game, you would have to start the game over again to correct the mistake made last time. Perhaps this is a bug?

I just had that problem with Kreia and Bao-Dur. The only remedy I found is to go with them to Dxun Mandalorian hideout and fight in the ring. That fixed my companions, but both of them must be with you - those staying at Ebon Hawk wont get fixed. I dont know if I have save game thou.

Don't remember exactly but I lost due to cheating once. Don't remember how I cheat (and if I cheat), they just stop and said I lost, so I assumed I cheated accidentally. And I lost 5-1 battle too. I had one save just before 5-1 battle, and my companions were already broken, so maybe "cheating" broken them. I'll check the saves when I get back from work but I think that one is overwrited.

I have this problem and have a save just after the 5-on-1 battle. Before the fights I freed my companions (including T3), then challenged a Handmaiden Sister. Lost the first fight several times and accidentally cheated once during the third one (put on a robe before the fight or in the beginning of the fight, do not remember). Corruption must have occured sometime after the first fight, because Bao-Dur and Kreia followed me and I was able to choose Bao-Dur after it.

It can be if you continue with them broken as they were, as can also be seen by Ebon Hawk cutscenes not triggering properly.
So it's good you reloaded and unstuck them before continuing on with the game.